Tool for extracting cotter pins and the like



Jan. 29', 1924.

A. DANIELSON TOOL FOR EXTRACTING CUTTER PINS AND THE LIKE Filed June 13 1922 l w im.v

Patented Jan. 29, 1924.

UNIT En STATES ALFRED DANIELSON, or BLncK RIVER 'FAILLs, WISCONSIN.

TOOL non EXTRACTING cor'r'n'n Pins AND THE LIKE.

Application filed mums, 1922. semi No. 568,075.

- which the following is a specification.

This invention relates toimprovements in tools for extracting cotter pin'sand similar fastening elements and has as its general object to provide a tool which may be con veniently employed for this purpose, and

-more effectually than tools heretofore de signed.

Another important object of theinven tion isto'provide a tool embodying an element for engagement through the eye of the cotter pin to be extracted and coacting with a part so formed and arranged with respect thereto as to urge the eye of the pin on to said element in a firm and secure manner and at the same time brace the element so that it will not be liable to become broken off or distorted when strain is imposed upon the tool in the act of extracting the pin.

In the accompanying drawing:

Figure 1 is a side elevation of the tool embodying the invention, the view illustratin the manner of using the tool;

Fig. 2 is a plan View of the tool, the View illustrating the initial position of the cotter pin when engaged by the tool in full lines and in dotted lines the position to which the pin is urged or forced when the jaws of the tool are brought together;

Fig. 3 is. a detail side elevation of the operative end of the tool;

F ig. 4 is a detail transverse sectional view on the line 4.-4 of Fig. 1 looking in the direction indicated by the arrows.

The tool embodying the invention comprises a pair of members indicated one by the numeral 1 and the other by the numeral 2, these members being connected by a pivot 3 and having handle portions indicated re spectively by the numerals 4 and 5. One of these portions may, if desired, be provided with a staple pulling hook indicated by the numeral 6, although this feature is not essential to the general use of the tool. The member 1 of the tool is provided with a aw indicated in general by the numeral 7 and this jaw comprises a part 8 extending forwardly beyond the pivoted part of the memher and thence bent to substantially U or V 1 form, thus providing a portion 9 and a jaw portion l'which latt'erportion is preferably flattened and tapered 'in'the direction of its extremity and formed with av notch indicated by the numeral 11. One wall of the notch 11, which wall is indicated by the numeral 12, is disposed. perpendicular and at right angles to the axis of the pivot 3 whereas the other wall of the notch indicated by the numeral 13 is inclined with relationvto the wall 12,asbest shown in Fig. act the drawings.

The member 2 is providedwith ajaw portion whichis indicated by the numeral 14 and which, in the pivotal movement of the members, rides at its end past the face of the portion 10 of the jaw member? which is presented toward saidpivot,and this jaw member 14 is provided with a laterally projecting stud designed to be engaged in the eye of the cotter pin to be extracted, the stud for this purpose being preferably of the tapered form illustrated in Fig. 4. That face of the portion 10 of the jaw memher 7 which is presented toward the pivot 3 is preferably curved on an arc concentric to the pivot, and the stud 15 is so located that it will sweep on this are in the pivotal movement of the members 1 and 2. There fore the stud member will, when the men1- bers are closed upon their pivot, ride downwardly along the face of the said portion 10 substantially in contact therewith, as best shown in Fig. 1 of the drawings.

In the use of the device the stud 15 is engaged in the eye of the cotter pin to be extracted and the members 1 and 2 are then closed upon their pivot 3 thus urging the shank of the cotter pin downwardly into the notch 11 and bringing the same in contact with the wall 13 of this notch. As

this wall is inclined in the direction of the inner end of the stud 15, the eye of the cotter pin will be urged or forced on to the said stud and into firm engagement therewith. Having thus engaged the tool with the cotter pin, the outer surface of the portion 10 of the jaw 7, which surface is preferably rounded as shown in Figure 1, is brought to bear against an adjacent part and serves as a fulcrum, when the tool is canted, in extracting the pin.

Where the eyes of cotter pms to be extracted are not materially distorted or fiattened, no difliculty will be experienced in engaging the stud 15 in the eye of the said pin but where the eye is so damaged or distorted as to render such engagement impracticable, the tool may still be employed inasmuch as there are provided upon corresponding lateral faces of the jaws '7 and 14, laterally projecting lips or auxiliary jaws 16 between which the mutilated head of a cotter pin may be gripped, and the jaw member 7 then employed as a fulcrum or lever means to extract the pin.

Having thus described the invention, what is claimed as new is:

1. In a tool for extracting fastening elements, pivoted members having coacting jaws, one of said jaws having a notch in its end and having a face substantiallyconcentric to the pivot and the other jaw being provided with an element for engagement with the fastening element to be extracted and extending in a direction transverse with relation to the said face of the first-mentioned jaw and the notch therein and movable in an are substantially concentric to the said pivot.

2. In a tool for extracting fastening elements, PIVOtQd members having coacting jaws, one, of said jaws having a face sub stantially concentric to the pivot and the other jaw being provided with an element for engagement with the fastening element to be extracted and extending in a direction transverse with relation to the said face of the first-mentioned jaw and movable in an are substantially concentric to the said pivot, the first-mentioned jaw being provided with a notch to receive the shank of the element to be extracted and having a wall inclined with relation to the direction of movement of the engaging element of the second-mentioned jaw.

In a tool for extracting fastening ele; ments, pivoted members having coacting jaws, one of said jaws having a face substantially concentric to the pivot for the members and being provided with a notch,

vone wall of which is inclined with relation to the line of curvature of said face, the other jaw being provided with a laterally projecting stud positioned to extend across the notch and the said face of the firstmentioned jaw in the pivotal movement of the members.

In testimony whereof I aflix my signature.

ALFRED DANIELSON. [1,. 5.] 

